RE: large scale war ships
Check out the Scale shipyard.
I am building two of their models at the same time. The First is a 71" Aegis Cruiser, and the Second, my favorite , is the USS Iowa BB61 "modern. The battleship is 9 Feet- four inches long, and will have four turning screws. I am building both models with turning radars, and lights. Operating anchors is an option. With models this large, the amount of scale almost has no limit(real teak deck, hollow-steel barrels, training guns, interior bridge lights, nav and search lights. ) . The battleship can only be launched with two people since the bulk of her, and the fact that she is close to 200 lbs. These are shop fillers too at this size. My project now is to make it shoot rockets(missiles) like the real Iowa.
I will be happy to send pics.
Greg